code: def _close(self):
      self._closed = True
      for key, val in self.items():
          if isinstance(val, (AutoDict, AutoOrderedDict)):
              val._close()
  
imports: from __future__ import absolute_import, division, print_function, unicode_literals
  from collections import OrderedDict, defaultdict
  from .py3 import values
label_desc: Use image node_id 1 for calling the AutoDict obj's underlying member method code with example usage: obj._close() without return types